Average annual temperature is 11.4 °C
Absolute maximum temperature: 32.4 °C
Absolute minimum temperature: -21.8 °C
Number of sunny days: 162 days
Number of rainy days: 200 days
Number of snow days: 3 days
Look at detailed online map of Old Mystic
* Weather data for Old Mystic United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.1 | 19.1 | 14.0 | 31.0 | 28.2 | 28.1 | 31.5 | 29.0 | 32.4 | 27.0 | 17.1 | 15.0 |
| Average daytime temperature (°C) | 7.1 | 6.3 | 8.5 | 16.0 | 19.9 | 23.3 | 27.7 | 25.4 | 22.6 | 18.5 | 9.9 | 8.3 |
| Average temperature (°C) | 3.3 | 1.7 | 3.8 | 10.5 | 14.0 | 17.9 | 22.9 | 20.8 | 18.2 | 13.5 | 5.1 | 4.2 |
| Average night temperature (°C) | 0.0 | -2.6 | -0.3 | 5.9 | 8.6 | 13.4 | 19.1 | 17.0 | 14.9 | 9.9 | 1.1 | 0.8 |
| Absolute minimum temperature (°C) | -5.1 | -21.8 | -4.2 | -2.3 | 2.9 | 6.6 | 14.5 | 12.4 | 8.1 | 4.8 | -4.9 | -6.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.0 | 6.6 | 7.6 | 8.8 | 11.8 | 10.5 | 10.8 | 9.8 | 7.5 | 8.0 | 7.2 | 5.5 |
| Precipitation (mm) | 166 | 52 | 109 | 94 | 81 | 91 | 158 | 146 | 232 | 73 | 38 | 191 |
| Sunny days | 9 | 14 | 15 | 16 | 22 | 8 | 9 | 6 | 13 | 13 | 21 | 16 |
| Rainy days | 21 | 12 | 16 | 14 | 9 | 22 | 22 | 25 | 17 | 18 | 9 | 15 |
| Snow days | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Old Mystic during the most sunny months:
The largest precipitation sum in Old Mystic is at